Strainer for oil presses



Nov. 17,1925.

FiledApril 9, 1921 2 Sheets-Sheet 1 Fig.1

Wit/mama: 5; y I Y=WAMF$ Nov. 17,1925- 1,562,134

. H. ZANDER STRAINER FOR OIL PRESSES Filed April 9, 1921 2 Sheets-Sheet 2 .7 59 4 Fig. 5

hit/axes.- jaw/aw)".- find M W 9-" WA Patented Nov. 17, 1925.

UNITED STATEii HER/MANN ZANDER, OF I STETTIN, GERMANY. v

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Application filed pm '9, 19'21'1'j serial no. 460,067.

I (GRANTED UNDER'THE rnovrsrons mm Aer 0 mm; 3,"1921;'41v Sm. r'..,*"1':i 1"s. f"

T0 all whom it may concern Be it known that I, HERMANN ZANnER, a citizen of the German Republic, residing at Stettin, Germany, have invented certain new and useful. Improvements in Strainers for Oil Presses, of which the following is a specification.

The construction or automatically fed oil pressesis very difficult and expensive" as the'heighto'f the strainer must be very "small due to loss of pressure owing to the friction upon the side walls of the material being pressed. The cross section of-the strainer must be small in orderto ensure a good flowing out of the oil; but the smaller this cross section is the greater becomes the loss due to friction so that, for all these reasons, the selections of the vertical dimensions is greatly restricted. p n

According to this invention the strainer is subdivided 'in vertical direction, so' that in the direction of pressure a number of small low strainers succeed between which points of interruption are arranged which serve as oil outlets. The height of thesmall individual strainers is very low'and the loss from friction is not considerable.

In order that the invention may be clearunderstood, I shall proceed to describe the same with reference to the form of construction diagrammatically shown by; way ofexample in the accompanying drawings, wherein p Figure 1 represents a tubular strainer. Figures 2 and 3 representing each an annular strainer. I p p Figures 1 to 3 show the first form of construction of the strainer.

Figure it showsv a modified form of construction. i

Figure 5' illustrates a form of'construction in which the forms of construction shown by Figures 2 and 4 are combined.

With reference to Figures 1-3. the strainer.

is composed of superposed individual strainers 2 with inserted distance pieces 6, of the pistons 3 and 4 and of the funnel 1. The tubular strainer shown by Figu-refll works as follows g The lower piston 4 is first raised to the lower edge of the upper strainer ring 2,

whereupon the piston 3 is operated manuali any suitable means and presses marough the funnell until the ring 2 1s ly or b terial tii -or abutment to filled. The piston-*3 is raisedgto permit'introduction or fresh ma'terialf'and when a predetermlned pressure is reached the piston is lowered by any suitablemeans'to the lower edge of the'nextstrainer ring'2 which allows the cake formed" in the first strainer ring to'descend into'the'neX-t one. In this strainer a determined J quantity of material is thus preliminarily compressed and formed into a solid'cake which is subsequently pushed through the strainer; from top, to ,bottom and is finally expelledfrom the bottom= end.

With every new stroke of "the pistons- 3 ancl 'tfresh material is filled-'into the upper strainer 2 and compressed, "the previously compressed cake descending into the next lower strainer. Thecakes are continuously submitted to the pressure action, this-pres sure being howevernotused for 'var yin'g the I shape of the cake which has been formed in the up'perstraine'r' 2 but merely for squeezing out oil which does fio'w; out through-the perforated'side walls er the With -a' view to facilitateithe admission'of the cakes *from' one 7 strainer into the lower strainer whenthe' shape' of the cake 's'hoiild have been slightlyaltered,- th trai are flared 'at their up 'sp v a I I When the cakefirst formed reached strainers and through-the distance pieces'e.

returning to position in "the bottomend of the'tubular strainer" toserve-as a bottom counteract the pressured pressing has to be effected in batterisfso 'that it lasts'longenthe working isinterrupted when the first "cake has reached the end of "thestrainer. "Ihe'strainer is emptied by "means: of a simple pushing pistonorat I, the next charge n the manner describedin co nnection' with T the continuous working. The old cake serves now as resistance. An

oil. press of this construction can therefore ',ure 2'will be' easily understood iromf the 'beused either as' aut omatic'press orasfil'ling j and emptying press for thefbatteries, pro- "vided that the strainer bemovabled;

description as above. In the ring press shown in Figure 3 the distance pieces 6 be tween the walls of the strainers are not situated in the same plane as shown by Figures 1 and 2 but those of the inner cylinders are displaced with regard to those of the outer cylinders. I

Figure 4 shows a form of construction according to which the entire strainer column is composed of individual strainers with interposed distance pieces, auxiliary devices forcompleting the pressing action of the pistons 3 and '4 being provided. I I

The strainer is composed of the individual strainers and of the distance pieces 6 which form enlargements. A vertical rod 10 traversing the strainer column has small pistons 7, one for each individual strainer, which fit into said strainers. Conical strip- ,pers 8 are arranged above said pistons 7. The rod 10 is adapted to execute a reciprocating movement, a separate drive, e. g., a piston 11, being provided for this purpose. The rod 10 could also be connected with the main pressure piston 8. The rod 10, is perforated'so that the outflow of the oil is facilitated. The material to be pressed drops from the funnel'l into the strainer being pushed inby the .piston 3. When the press is being chargedthe pistons 7 aresituated in the enlarged distance pieces 6 ig. 4) so that the material can get around the pistons 7 and around the strippers 8.

As the material to be pressed consistsof oil containing substances it does not fill the strainer automatically but has to be pushed down bythe reciprocating motion of the rod 10 withthe pistons 7 and strippers 8, the material being thus preliminarily pressed.

When the strainer is filled the pressing proper begins as the pistons 7 are moved by the rod 10 from the enlarged distance pieces 6 into the corresponding strainers 2. When the pistons get into these narrowstrainers they findan increased resistance, which results on the one hand from the filling of the strainers and on the other hand from the pressure exerted'by thepistons 3 and 4, the pressure a'ctmg much stronger in the narrow strainers than in the enlarged distance piepe's 6.

. When a determined pressure has been reached in the strainer, the piston 4 is lowered manually or by any suitable means known the art and part of the lowest cake will be expelled as the lowest small piston/7 descends down to half the height of the lowest strainer 2. Some space will Y thus get free in the lowest enlarged distance pistons is thereby drawn along by piston 3 so that these pistons are situated again in ance so that the material which has just been fed into the strainers is compressed.

The strokes of the rod 10 and of the piejtons 7 are short. They are determined first by the position of the pistons 7 in the enlarged distance pieces 6 during the charging operation, secondly by the position ofthe pistons at each pressing, thirdly by the position of the pistons at the idlestrokeas'in this case the pistons. go down "to the lower edge of the narrow strainers 2 to expel the whole cake. 1 a

a By the form of constructionshown by Fig. 5 a combination of the forms of con struction according to Figures sand 4 is illustrated. Below tubular strainers constructed as. described with reference to Fig. 4 a ringfstrainer with annular pistons 3 and 4 is arranged. The tubular strainers have pressing pistons 30 and 40' The upper annular piston 3 for the ring strainers surrounds the tubular strainers. The ring strainer has distance pieces 6, the tubular strainers have enlargements 60 between the narrow strainers 2. Conduits 9 serve for connecting the outlets of the tubular strainers with the funnels 1 of the ring strainer. The

lowest pistons 7 upon'the rods 10 correspond in shape with the conduits 9. This arrangement presents the advantage that two-different pressures can be applied successively. I

It may be remarked that progressing variations of pressure can'be produced in the strainer. shown, by Fig. 4 by reducing the diameters of the narrow strainers 2 and consequently of the corresponding pistons 7 from the lower endstrainer to the upper end strainer.

I claim v v An improved strainer for oilpresses comprising a number of superposed indi- Vidual strainers of low height offering little resistance from friction and distance pieces separating the superposed strainers.

' 2. An improved strainer for oilpresses comprising a'number of superposed individual strainers of low height offering little resistance: from friction, distance pieces separating'the superposed strainers, a reciprocating rod axially arranged in said strainer and pistons upon said red 'one for each individual strainer.

3. An improved strainer for oilp'res'ses comprising a number of superposed individual strainers of low heightofi'ering little resistance from friction, distance pieces separating the superposed strainers, a reciprocating rod axially arranged in said strainer, pistons upon said rod one for each individual strainer and a stripper over each of said pistons on the rod.

4.. An improved strainer for oilpresses comprising in combination anumber of superposed ring-shaped strainers, distance pieces between said individual ring shaped strainers, a pressure piston at the upper end of the column of ring-shaped strainers and a counter pressure piston at the lower end of for alternately loosening and compressing the material to be compressed, said tubular columns being arranged above said ring shaped strainer column and conduits, con necting the outlets of said tubular" strainer column with the inlets of said ring-shaped strainer column, substantially as described and shown and for the purpose set forth.

In testimony whereof I affix my signature.

HERMANN ZANDER. 

